<div *ngIf="hero">
<h2>{{hero.name}} details</h2>
<div><label>id:</label>{{hero.id}}</div>
<div>
    <label>name:</label>
    <input [(ngModel)]="hero.name" placeholder="name" />
</div>
    <button (click)="goBack()">Back</button>
    <button (click)="save()">Save</button>
</div>